Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

1948 Westinghouse Model 1821 (182) audio problems
#40

Quote:Even 50 is wrong. Should not exceed 40uF.


morzh, 50 MFD is NOT incorrect, that's what's in there right now, its a 3 section can that has 2 sections that are rated at 50 MFD @ 150 WVDC and then a 3rd section that is 20 MFD @ 25 WVDC, the filter cap can that's in there right now is the original unit to the radio, the Riders even calls for a 50/50 MFD @150 WVDC  and 20 MFD @ 25 WVDC.

Unfortunately there's no such thing as a 50 MFD cap anymore since they changed the capacitor rating system back in the 1970s, so the next closest thing is a 47 MFD (which I don't have on hand right now, I would have to order it) or a 68 MFD Cap (which I don't have any of those around either and those would have to be ordered too).

So either way right now the only capacitor I had on hand was the one that could replace the 20 MFD at 25V unit, which I replaced that with a 22 MFD at 63V.

But the good thing is, the place where all of the e-caps need to go are conveniently located near a terminal strip with an unused lug that ties to chassis ground so all I need to do is get some axial lead 47 MFD or 68 MFD @ 160 V e-caps to replace the remaining sections of the old can and solder the negative leads to the unused terminal strip that's tied to chassis ground and then tie the positive leads to their respective terminal leads, and that has eliminated about a foot and a half of wire out of the chassis that was used to connect the old can cap to their respective tie points, and thus cleaning up the chassis more.

Also in regards to the output transformer that I had said was "dead" it actually isn't because when I was probing around in the radio with it turned on with my DMM (the radio was plugged into an isolation transformer) I was able to get it to produce a hum, a loud hum at that, so I'm wondering if there isn't a cold solder joint on one of the output transformer primary leads and where they connect.


Messages In This Thread
RE: 1948 Westinghouse Model 1821 (182) audio problems - by captainclock1988 - 09-10-2020, 10:32 AM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
trying to identify this wire type
The red wire is rubber covered wire. The others are cotton braid over rubber often in colors or a tracer, also strand...Chas — 02:43 PM
trying to identify this wire type
Greetings Phorum members, Hope you can help me identify this type of wire in the photo I have attached.  I am not sure ...georgetownjohn — 01:53 PM
Philco 60 Squealing
All correct shields must be in place, all tubes correct no subs of any kind. Check any soldered, riveted ground conne...Chas — 01:24 PM
Philco 60 Squealing
I have recapped and replaced out of tolerance resistors and so on. Radio plays nicely on fairly strong stations. The pro...dconant — 10:55 AM
Philco 46-420 Code 121 Reception issues
Welcome Eric, I agree with Bob and far as the two main electrolytic filter capacitors did you change them yourself or w...radiorich — 11:43 PM
Philco 46-420 Code 121 Reception issues
You mentioned the Philco manual and going through the check points...just to be sure we're on the same page here's the m...klondike98 — 08:13 PM
Philco 42-1008 conversion kit
Interesting. I haven't seen that before.klondike98 — 07:02 PM
12' Philco
Yes I had looked for it on the web as well some time back and could not find it. I was glad to see it turned up in Ron'...klondike98 — 06:59 PM
Shadow Meter Bulb
Now if you had a set with a tuning light then the bulb type is important to the circuit, some sets used those prior to t...Arran — 04:58 PM
Shadow Meter Bulb
Ok. Thanks for the correction.RossH — 03:09 PM

[-]
Who's Online
There are currently 3830 online users. [Complete List]
» 2 Member(s) | 3828 Guest(s)
AvatarAvatar

>